JPS59120589A - Derailer for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a bicycle derailleur (1), more specifically, a bicycle derailleur (1) comprising a base, a link member, and a movable member; This invention relates to a derailleur that changes gears by replacing one of the multi-stage sprockets on a bicycle.

Conventionally, in a derailleur configured as described above, among the two members that move relative to each other when the movable member moves,
A locking part is provided on one side and a locked part is provided on the other side, and the shifting position of the chain guide provided on the moving member F is set and the set position is maintained. Taylor is known to have done so.

However, when using the position setting mechanism consisting of the locking part and the locked part as described above, the amount of movement of the cheese guide is set and the movement is quantitative, so each sprocket is moved quantitatively. When used with a multi-stage sprocket whose center line spacing (・L) in the width direction matches the quantitative movement amount of the chain guide, the chain guide will be connected to each of the sprockets during gear shifting. Although it can be stopped at a position corresponding to the width direction center line and there is no problem, the spacing between the width direction center lines of each sprocket (L) is an interval commensurate with the quantitative movement amount of the chain guide. Therefore, in the past, the MfJ chain guide, which moves quantitatively during gear shifting, cannot be stopped at an appropriate position corresponding to the center line in the width direction of each Sugerocket. Therefore, in the past, the chain guide It was necessary to prepare many types of tee wheels with different quantitative movement amounts, or to use them in conditions where they had poor speed changeability and were prone to making noise due to contact between the chino and sprocket.

The present invention has been devised in view of the following two conventional problems.An object of the present invention is to enable quantitative movement of both the chain guide and the engaged portion during gear shifting. By adjusting the engagement position with the GC, the quantitative movement amount of the chain guide shell can be adjusted.

Therefore, the configuration of the present invention includes a base member, a link part H, and a movable member, and by the movement of this movable member with respect to the base member, the chino guided by the chino guide can be replaced with one of the multi-stage sprockets of the bicycle. A gear shifting Taylor trailer, when moving the movable member,
Of the two members that move relative to each other, one is provided with a locking portion and the other is provided with a locked portion to set the shift position of the movable member, and the engaging portion and the locked portion are By providing an adjusting means for adjusting the engaging means of the engaging part to the engaged part on at least one side, the quantitative movement amount of both the chain guides can be adjusted by operating the adjusting means. (hereinafter referred to as the derailleur of the present invention)
An example will be described based on the drawings.

What is shown in the drawing is a rear derailleur, and its basic structure consists of a fixing member (1) as shown in Figure 1.2.
The drayage main body (A), that is, the base member (
2), two link members (3), (4), and a movable member (5).
A), and the fixing member (1) includes:
It is fixed to the front end of the bicycle, and the base member (2) of the derailleur body (A) is supported by the fixed member (1) to freely swing through the horizontal shaft (6). It will be done.

Further, the base member (2) is provided with a pair of mounting pieces facing each other 17 on one side, and these mounting pieces J]
Through the pair of bins (7) and (8), the link member (3
), (4), and the link member (
The movable member (5) is pivotally attached to the free ends of 3) and (4) via a pair of pins (9) and (10).

This movable member (5) has a similar shape to the base member (2), and has mounting pieces provided on one side of the movable member (5) in opposite directions.
, this mounting piece VC is attached to the two bottles (9) and (10) mentioned above.
is attached to the link members (3) and (4) so as to be pivotable relative to each other, and a guide pulley is attached to the other side via a horizontal shaft (11) extending in the same direction as the horizontal shaft (6). (not shown) and a tension bar (I2) are housed so as to be rotatable within a certain range, and the swinging of the link members (3) and (4) The movable member (5) moves parallel to the DJ base member (2) between a high speed position and a low speed position as shown in FIG.

Furthermore, a chino guide (13) is housed in the movable member (5).
) is the guide pulley and the tension pulley (1
2) and a hanging frame (14) that rotatably supports these pulleys, and this hanging frame (14) is connected to the movable member (5) via the horizontal shaft (11). 1. Also, the main body (A) of the dirage constructed as described above has a shift resistance that acts when shifting, such as when the chain that slides on the multi-stage Sugerocket of a bicycle is not moving. The operating wire (W) can be operated even when the resistance is greater than the normal resistance, that is, the shift resistance when the cheno is moving 1-, and an energy storage mechanism (20) is provided that allows this operating force to be stored. 1. This energy storage mechanism (20) is 1.
A pair of energy storage plates (21), (21) and these energy storage plates (21)
), (21), and an operating arm (23) having an interlocking rod (24). A movable member (5) is pivotally supported on the bin (10) that is pivotally supported on one link member (4), and one is placed at an inner position and an outer position of the link members (3) and (4), The energy accumulating bar (22) urges the energy accumulating plates (21), (21) toward the link member (4), while the operating arm (23) is urged toward the bin (1).
0), the tip of the interlocking rod (24) is interposed between the energy storage plates (21), (21),
The operating wire (W) is fixed to a fixing member (15) that supports the bin (9), and an actor cylinder (0) for guiding the wire (W) is supported on the operating arm (23). , the energy storage plate (21) by operating the wire (W);
(21) - force W to the derailleur main body (A)
The storage spring (23) is swung together with the operating arm (23) to switch to a desired gear position in advance, and when the large gear shift resistance is released, that is, when the gear starts to move, the energy storage spring (
The restoring force of 22) is used to move the gear shift guide (13) to the position of the shift stage previously switched by operating the operation wire (W), and in the case of normal shift resistance. , is swung integrally with the link member (4) by the energy storage spring (22)K. Therefore, the energy storage mechanism (20) is not necessarily required.

Therefore, one side of the movable member (5) 4=-J piece (5
a) in the direction of the base member (2), and a plurality of retaining parts (30) and one of the retaining parts (30) are selectively attached to the outer surface of the distal end of the extension part (5b). The secured part (
40) of the position setting mechanism, and supports the holding body (31) having the holding part (30), and also supports the holding body (31) having the holding part (30), and
4), the link part #A' (4),! The secured portion (
40) to set the shift position of the movable member (5), and the engaging body is connected to the bin (31).
), and one of the engaging body (31) and the movable movable member (5) (movable member 5 in the drawing) is provided with the engagement body (31) and the movable movable member (5). Part (30)
Adjustment screw (
50) and other adjustment means were provided.

In the above configuration, the retaining portion (30) is formed by the same number of grooves or elongated holes as the number of gear speeds, as shown in FIG. Said movable member ( 5) are arranged in a row at predetermined intervals in the swinging direction, and between the movable member (5) and the retaining body (31) provided with the engaging part (30), the engaging body The engaging body (31) is provided with a spring (33) that biases the engaging body (31) in one direction in the swinging direction.
31) includes an arcuate guide hole (34) for guiding the interlocking rod (24), and a pair of regulating portions (35) and (36) for regulating the swinging range of the operating arm (23). It is set up. Note that the shape of the engaging body (31) in which the retaining part (30) is provided is not particularly limited. Furthermore, the engaged part (40) may be a transmission body such as a ball or a ball, This rolling element is connected to the operating arm (23) via a spring (41) and a cylindrical holder (42).
In addition, for example, the engaged portion (40)
may be formed integrally with the operating arm (23), and the operating arm (23) may be bent when the engaging portion (30) and the engaged portion (40) are engaged. Also, previous d1
b The engaging body (31) provided with the overlapping part (30) is attached to the secured part (
40), and the structure thereof is not particularly limited.

Further, the adjustment screw (50) is provided with a rising piece (5C) on the extension part (5'o) of the movable member (5), and is screwed onto the rising piece (5C) so that the tip thereof is set at +3rf. Engagement body (31)
The engaging body (31) is brought into contact with the abutting portion (81b) of the body, and by screwing the adjusting screw (50), the engaging body (31) is swung clockwise in FIG. 2.4 against the spring (33). , engaging portion (30
) to the locked part (40), and the movable member (5), as well as the chain guide (13) provided on the movable member (5), are quantitatively set by the nfJ marking ft setting mechanism. By increasing the amount of IS movement and by retracting the adjustment screw 50), the engaging body (31) is swung counterclockwise by the restoring force of the spring (33) shown in Fig. 2.4, and the maintenance is performed. Joint (3
0) to the engaged portion (40), and quantitatively move the chain guide (I3). This is done by reducing the amount of ICIJ.

In the figure, (16) is an adjustment screw that adjusts the position of the chain guide (13) with respect to the base member (2) VC set by the position setting mechanism, and (I7) is the chain guide (13).
This is a tension spring that biases the clockwise direction in Figure 1.

In addition, as the operation wire (W) in item 10, a push-pull type wire with a small amount of deflection is mainly used.

What is shown in Fig. 1.2 is a state in which the chain guide shell (13) is in a position corresponding to the center line in the width direction of the small diameter sprocket in the multi-stage sprocket, and the retaining part (30) of the position setting mechanism is As shown in FIG. 2.4, the high-level locking portion (30a) is engaged with the locked portion (40). When the operating wire (W) is pulled in this state, the fixing device (1
The distance between the fixed position of the wire (W) fixed to the operating arm (23) and the supporting position of the actuator cylinder (0) that supports the IC is shortened, and the operating arm (23) is first fixed to the operating arm (23).
) swings in the direction of arrow X in Figure 2, and the link member (
3) and (4) swing in the direction of arrow Y in Fig. 2, and as the link members (3) and (4) swing, the movable member (5) and chain guide (I3) move towards the multi-stage sprocket. moves in the direction of the large-diameter sprocket, and the high-stage engaged part (30a) and the engaged part (40) are separated from each other, and the low-stage engaged part and the engaged part (40) are separated from each other. can be engaged sequentially, and the chain guide (13) moves by the quantitative movement amount (E) set by the position setting mechanism as shown in FIG. 5, and moves in the width direction of the desired large diameter sprocket Stop at a position corresponding to the center line.

Also, when the front 1 wire (W) is pushed out from the state where the chain guide (I3) is moved to the large diameter sprocket side, there is a gap between the fixed position of the wire (W) and the support position of the actuator tube (0). The distance between the link members (a) and (4) becomes longer, and the link members (a) and (4) become the second link members.
The unwound operating arm (23) swings h in the direction of arrow X in the figure and in the direction of arrow Y in figure 2, and the link members 1g), (4
), both the i1 moving member (5) and the chain guide (
13) moves toward the small-diameter sprocket of the multi-stage sprocket, and as the groove operating arm (23) swings, the low-stage side retaining part and the engaged part (40) are disengaged, and The engagement portions on the higher stage side become engageable with the body to be held (40) in sequence, and the chain guide (13) is moved every quantitative movement amount <1) set by the position setting mechanism. , and stops at a position corresponding to the desired widthwise center line of the small diameter side sprocket.

Next, the quantitative movement amount (1) of the chain guide shell (13) set by the position setting mechanism of the Taylor trailer is determined by the distance (L) between the center lines in the width direction of each sprocket in the multi-stage sprocket.
If △L is more than 2, and adjust the locking position of each locking part (30) to the locked part (40) as shown by the chain lines in FIG. Reduce the amount of movement by Δt, -((r-
The amount of movement is set to be Δヱ), which corresponds to one box (L) between the center lines of the sprocket in the width direction.

In addition, if the quantitative movement amount of the chain guide (13) set by the position setting mechanism is less than the above-mentioned interval (■,), rotate the adjusting screw (50) in the backward direction to adjust the above-mentioned distance. For example, the fourth engagement body (31) is moved by the restoring force of the spring (33).
Each retaining part (30
) to the locked part (40), and increase the target movement amount by the position setting mechanism of the chain guide shell (13) marked η0 to reach the movement amount (L + Δ2). 1-1 The above interval (
The amount of transfer #J is set to correspond to L).

In the embodiment described above, the engaging portion (30) is connected to the engaging body (31).
) to support the holding body (31) in a swinging manner independently with respect to the movable member (5), and an adjustment provided on one of the engaging body (31) and the movable member (5). Adjust the secured part (30) described in 1a and the secured part (4
0], but the engaged portion (40) may be independently movable.

In this case, for example, as shown in FIGS. 6 to 8, the engaging portion (30)
is provided on the extension part (5b) of the PJtJ movable member (5), while freely supporting the K adjustment screw (50) of the operating arm (23) only for the same rotation, and
3) The holder (42) support position eζ hole (25)
is provided to connect the holder (42) to the operating arm (23).
When the adjusting screw (50) is screwed into the holder (42) and the adjusted screw (50) rotates, the secured part (4 o) held in the holder (42) ), an engaging part (30) consisting of four strips or long holes.
By moving the engaged portion (40), the engagement position of the retaining portion (30) with the engaged portion (40) is adjusted. In addition, (17), (18
) l-1: A stopper provided on the extension portion (5b).

In addition, although the retaining portions (30) are formed by grooves or elongated holes and are arranged in a row along the moving direction of the movable member (5), the retaining portions (30) may have a cam direction (61) as shown in FIG. Cam body (6
0) i'ifj cam surface (61)K, the retaining portions (30) of the same number as the variable stage number are provided in stages, and each retaining portion (30
) is an inclined surface that slopes outward (R direction) in the same direction as the swing center line (X) of the cam body (60), and the cam body (60) is, for example, a slope of the movable member (5). Extension part (5b)
This cam body (60) or the secured part (
40) is movable in the same direction as the swinging center line of the cam body (60), and the engagement position of the engaging portion (30) with the engaged portion (40) may be adjusted. good.

In addition, in the above explanation, only the engagement position of the retaining portion (30) to the engaged right heel (40) is adjusted by adjusting means such as the adjustment mechanism 50).
Others, for example, as shown in Figures 10 to 12, the retaining part (30)
In addition to adjusting the engagement position of the engaging part (30) and the engaged part (40) to the derailleur body (
The position relative to the base 1 ((-phase (2)) of the moving part 1a (jl+) may be adjusted by adjusting the position with respect to the base 1 ((-phase (2)). Shown: 4, !, :FJ
) supporting 1α Kawakibishi (]0) and 1 Nishikaku arm (5
1) - An engaging body (31) having a retaining part (30) is pivotally supported on one end of the adjustment arm 1 (51), and the other end and one side (51) of the movable member (5) are pivotally supported. In the drawing, 0T!1111 member 5
) is provided with an adjustment means such as an adjustment screw 52), and an adjustment means is provided between the end of the engagement body (3I) opposite the support position to the adjustment arm (51) and one of the movable members (5) (not shown in the drawings). The ErJJ member 5) is provided with an adjustment means such as the adjustment screw (50), and by operating the screw (52), [11]
The adjusting arm (51) is swung about the pin (10) as a fulcrum to form an engaging body (3I) having the engaging portion (30).
The operating arm (23) holding the engaged part (40) that engages with the retaining part (30) is operated together. 60
) of the cam (if it is installed on the rll, by changing the shape of the retaining part (30) 1) [Base member (2) of the LIJ guard member (5) described in j: - Fi, 7. Check t≦
Also, in the above explanation, (30') can be changed to τIJ'!I(1,1
The member (5) is connected to the engaged portion (40) by the energy storage mechanism (20).
), but an engaging portion (30) is provided on one of the link members (3) or (4),
The secured part (40) is connected to the externally applied link member (4) or (3)
Or 1 is base part +21 (2) or iJ' moving member (5)
K may be provided, or ■, the retaining portion (30) may be attached to the base member (
2) The engaged portion (40) may be provided on the link member (3) or (4) or the movable member (5), or the engaging portion (30) may be provided on the movable member (5). ), and the secured portion (40) is attached to the base member (2) or the force link member (
3), and if necessary, when the member (5) of 1-IfIf is moved, of the two members that move relative to each other, one of the two members is provided with the retaining part (30) and the other is covered with the retaining part (30). What is necessary is to provide the engaging portion (40).

As described above, according to the present invention, "1j' moving part shrine (multiple 40
When, among the two members that move relative to each other, the holding part that moves υ′ in the -· direction and the held part provided on the other side cause 5,i! '
1 , i[′1. While setting the shift position of the movable member and quantitatively moving the chain guide provided on the movable member, the engagement portion is Since the adjusting means is provided for adjusting the engaging position of the engaging part to the engaged part, by operating the adjusting means, the engaging position of the engaging part and the engaged part is changed,
Quantitative movement of the shifting position of the moving member, and thus of the chino guide 1. +You can adjust the amount. Therefore,
Even if the quantitative amount of movement of the chain guide tool does not correspond to the distance between the center lines in the width direction of each sprocket in the multi-stage sprocket, the chain guide tool can be adjusted by simply operating the adjustment means. The quantitative movement amount is 1
The amount of travel can be adjusted to match the interval (L) described in 11j, it is economical as there is no need to prepare many types of trailers, the speed change is long, and the noise caused by the contact between the cheno and the subroute 1 can be eliminated. be.

[Brief explanation of drawings]

Fig. 1 (d) is a partially cutaway front view showing an embodiment of the present invention's Taylor trailer, Fig. 2 is a bottom view, Fig. 3 is a partially cutaway side view of only the portion where the engaging portion is provided, and Fig. 4 is also the bottom view, 5th
The figure is an explanatory diagram showing the positional relationship between the multistage suifu ``1 bucket and the chino guide, and Figures 6 to 8 show another embodiment of only the portion provided with the engaging part and the engaged part. , Fig. 6 is a bottom view, Fig. 7 is a longitudinal side view, Fig. 8 is an explanatory diagram for adjusting the engagement position between the engaging part and the engaged part, and Fig. 9 is only the retaining part. 10 to 12 are explanatory diagrams showing still another embodiment, with some parts omitted. (2)...・Pace member (3),
(4)...Link member (5)...Movable member (I3)...
......Cheno guide tool (30)...
・・・・・・Engagement part (40)・・・・・・・・・・・・
Engaged part (50)...Adjustment screw agent Patent attorney Tsu 1) Naohisa Figure 2 32- Figure 5 Figure 6 (I-revised)/8.5bq ・Ma

Claims (1)

[Claims] A derailleur that includes a base member, a link member, and a movable member, and changes speed by replacing a chain 2 guided by a chain guide with one of the multi-stage sprockets of a bicycle by moving the movable member relative to the base member. , of the two members that move relative to each other when the movable member moves,
A portion related to one side and a locked portion are provided on the other side to set the gear shift position of the movable member, and at least one of the locked portion and the locked portion is provided with a locked portion of the engaged group. Bicycle derailleur-9 characterized by being provided with an adjustment means for adjusting the engagement position to the engagement part.